Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 402-860-6 | CAS number: 110553-27-0 CG 25-1320; IRGANOX 1520; TK 12229/1
Genetic toxicity: in vitro
Administrative data
- Endpoint:
- in vitro gene mutation study in bacteria
- Remarks:
- Type of genotoxicity: gene mutation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Not specified
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study conducted to GLP (taken from SNIF file). Registrant referring to studies >12 years old at the permission of ECHA.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Report date:
- 1988
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.13/14 (Mutagenicity - Reverse Mutation Test Using Bacteria)
- Deviations:
- not specified
- GLP compliance:
- yes
- Type of assay:
- bacterial reverse mutation assay
Test material
- Reference substance name:
- 4,6-bis(octylthiomethyl)-o-cresol
- EC Number:
- 402-860-6
- EC Name:
- 4,6-bis(octylthiomethyl)-o-cresol
- Cas Number:
- 110553-27-0
- Molecular formula:
- C25H44OS2
- IUPAC Name:
- 4,6-bis(octylthiomethyl)-o-cresol
Constituent 1
Method
Species / strain
- Species / strain / cell type:
- other: Salmonella typhimurium, TA 98, TA 100, TA 1535 and TA 1537
- Details on mammalian cell type (if applicable):
- Not applicable
- Additional strain / cell type characteristics:
- not specified
- Metabolic activation:
- with and without
- Metabolic activation system:
- 0.3 ml S9 fraction of liver from rats (Tif: RAIf (SPF)) induced with Aroclor 1254 and 0.7 ml of a solution of co-factors
- Test concentrations with justification for top dose:
- Concentration range in the main test (with metabolic activation): 20 ... 5000 ug/plate
Concentration range in the main test (without metabolic activation): 20 ... 5000 ug/plate - Vehicle / solvent:
- Acetone
- Details on test system and experimental conditions:
- Not specified
- Evaluation criteria:
- Not specified
- Statistics:
- Not specified
Results and discussion
Test results
- Species / strain:
- other: Salmonella typhimurium, TA 98, TA 200, TA 1535 and TA 1537
- Metabolic activation:
- with and without
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- not specified
- Vehicle controls validity:
- not specified
- Untreated negative controls validity:
- not specified
- Positive controls validity:
- not specified
- Remarks on result:
- other: all strains/cell types tested
- Remarks:
- Migrated from field 'Test system'.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information):
negative
negative with metabolic activation
negative without metabolic activation - Executive summary:
The substance is considered to be negative within this test.
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